Used to race with Mark back in the day helped him a few times, did you buy this from Jack (london calling)? Last time we were in touch with him he was still trying to get it back? Can you post some pics and confirm themotor is still the original one and i will see if i can get hold of him as he is i...

The slides come in various sizes and the size is determined by how much is cutaway from the backside of it. The larger the cutaway, the leaner the mixture (since more air is allowed through it) and the smaller the cutaway, the richer the mixture will be. Throttle valves have numbers on them that exp...

This may help, From and old tuning article Mikuni 33mm Smoothbores For those of you who still own these carburetors a little jetting trick. In order to get better throttle response install 0.6 air correction jets. This allows you to run a smaller main jet while still giving you approximately the sam...